Some have suggested that it stems from Hussenot's device, because it used film and "ran continuously in a light-tight box, ...
2d
A regional jet carrying 64 people collided with an Army Black Hawk helicopter. Reagan National Airport grounded all flights.
An American Airlines regional jet collided with a U.S. Army Black Hawk helicopter on Jan. 29. Both aircraft plunged into the Potomac River near Reagan Airport.
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